Honestly, it doesn't look particularly ominous to me. Does it look different from your other moles? Unless it changes drastically, 2-3 weeks should be fine. New and like other moles is fine. New and different from other moles warrants a check up. Truthfully, even if this were melanoma (I'd say unlikely), most types are slow growing. 2-3 weeks is nothing. I waited several months to have a biopsy on what I was sure was my second melanoma because of insurance issues. It was still the earliest stage. I think getting it checked is fine, but I don't think it's any type of emergency. Just my opinion, you have to do what makes YOU comfortable.

Since this is a new mole, I would have it biopsied. I think a couple of weeks are ok, but this is how my stage 4 metastatic melanoma began. Also, use a mirror and another person to check your entire scalp.